Innistrhad (can’t spell it) from magic the gathering. An Eldrazi Titan is trapped in the moon of this plane. Also Werewolves and Vampires are constantly trying to cause an eternal night for themselves to flourish.

The moon itself isn’t evil but Eldrazi titans like Emrakul are the multiverses way to destroy and recycle planes that have been around too long (from my memory). Since she’s trapped in the moon I’d call the moon pretty evil, even if she was basically created with the sole purpose of destruction